AFAIK, Military operations are completely separated from civilian ops. The middle area between the terminals are restaurants, large open viewing areas, coffee shops, etc......
I guess the "terminals" is/are actually 1 terminal, with an "A" side and a "B" side.
There are also "C", "D" and "E" gates and they are for commuter jets* and propeller planes. (1-2 gates each). Those 3 gates are actually accessible before security, and they are close to the A and B gates that you see landside (before security). You can probably go through these smaller terminals, and take shots of planes on the A and B ramps. If I remember correctly, the small C gates open up into the back of theA gates, and the D gates open up into the back of the B gates. I am not sure about the E gates, though.
I am basically living in ABQ
for the summer, so feel free to ask as many questions as necessary, and I will probably give you a good answer.